I have an inline script which I want to externalize but I also have noscript tags for that script. So if I externalize script, where do I put the noscript tags?
In the document, where you want the content to appear if the browser doesn't support JS. The location of the script isn't relevant.
(In general, you should avoid using <noscript> in favour of Unobtrusive JavaScript / Progressive enhancement. A browser not supporting JS at all is one of the rarer reasons for JS failing).